Method of making parts of safety razors of the vibratory type



March 26, 1940. 301-1 2,195,163 unmon up MAKING PARTS OF SAFETY RAZORS OF THE VIBRATORY TYPE Original Filed March 6, 193? 2 Sheets-sheaf 1 mlxmgl z'x g l 21 mg Z1 I INVENTOR.

BY ATTORNEY.

March 26, 1940; 3071" 2,195,163

METHOD OF MAKING PARTS OF SAFETY RAZORS OF THE VIBR'A'I'ORY TYPE Original Filed March 6, 1937 2 Sheets-Sheet 2 3'2 1! 2 iii 5?; ,29 1. 15 40 3 32127 34 Zfzy/Q. 29 Z? o v 24 Z7 Z 15 23 Wm-mwmm-mnv $29 IJAEMITET; 25 21 r 21 IN VEN TOR.

J M ATTOREEY.

. tentedMar. 1940' I v I units!) stares PATENTOFFIQE. 7

ETHon'orMAKING PARTS OF SAFETY RAZORS or THE VIBRATORY TYPE George R. Bott, Stamford, Conn; The Stamford I Trust Company, executor of said George R. Bott, deceased M Application March 6, 1937, Serial No. 129,451

7 Y Renewed Nvember18, 1939 1 '1 Claim. (o1. 76-104) This invention relates to razors, and more par- Fig. 10 is a section taken on line 113-40 of ticularly to razors of the kind in which a moving Fig. 9;

cutter member contacts directly with the skin Fig. 11 is a radial section of Fig. 9, taken on of the user, which movable cutter member has line H'l| of Fi'g. 9; cutting edges spaced from the skin combined with Fig." 12 is a similar radial section of the com- '5 a second stationary cutter member having-cutpletedcutting member taken on line ii -42 of ting edges, the cutting edges of both cutter mem- Fig. 14; I I I bers being arranged on teeth, as more particu Fig. 13 is a frontview of the same; larly described and-shown in my co-pending ap- I Fig- 14 is a. plan view'of the same; I g plication Serial No. 90,060, filed July 11, 1936. Fig. 15 isa plan view of a straight side cutting 10 The object of this invention is to providea member; and I f novel method of manufacturing the cutting mem- Fig. 16 is a perspective view ofv a number'of bers, and this method consists in subjecting a teeth of the same. I blank or plate to a stamping action whereby the Referring to the drawings, the'completed. cut- 15 configuration of the final product is delineated, ting member of. circularshape in whole or in 1 5 and then. subjecting the stamped blank or plate part; is shown in Figs. 4 to 8, and of straight to a grinding or cutting action to removetheresides is shown in Figs. 13 to 16. y from extraneous parts, as a result of which the j In'each case, thecutter member 20 is provided final membe-r is produced which has the sharp with aplurality of spaced teeth 2!. These teeth 2b cutting edges ready for use. in the embodiments shown, have each four sides, '20

The invention consists also of av new article of one side-22 in a plane at right angles to the plane manufacture in which teeth are so shaped as to of rotation in the case of Figs. 4 to 8, and at right present to the hair tobe out, an acute angle. angles to the axis of the motor used but not The invention herein is applicable in regards shown, for vibrating the cutting member in the I to shape both to circularly shaped razor cutters, case of Figs. 12 to 16. an embodiment of. which is shown in the 'afore- Another side 23 is formed by a coho-id having .said application, and: to rectangularly shaped I its apex in the axis of rotation of "the member. safety razors of the general'standard type now v2i] shown in Fi'gsfl, andis formed by an inclined on the market. v g I plane at an acute angle to thefaxis of the motor The. invention will be more fully described drive of the form shown in Fig. 1.5. In fact, in I hereinafter, embodiments thereof shown in the Fig. 15,,two' planes form this sidelof the teeth on drawings, and the invention will be finally pointed both. sides of the vibratingplate 200.. out in the appended claim. I Thereby, the sides 22 and 23 are inclined to In the drawings, wherein like symbols refer to each other and mergeinto a sharp line of merger, like or corresponding parts throughout the sevin the case of Figs. 4 to 8, along a circular line, '35 eral views- I 1 and in the case of Figs. 12 to- 16, in a straight Figure 11s a partial'plan View of the top cutline 24. l I ting member of acircular razor; I Thetwo remaining sides 26 and'26a of each Figure 2 is; a section taken o'nline 2-2 of toothareformed by planes each inclined tothe I Fig. 1; f base side 22, and the lines of merger form-the 40 Fig. 3 is a radial section taken online 3-3 of cutting-edges 25. These lines of "merger are the v,

Fig. 1; intersection lines of two planes passing through Fig. 4 is a similar section of'athe completed the respective-sides. 7 cutting memben'taken on line 4-4 of Fig. 5; Finally, the spaces between the teeth have an Fig. 5 is afpartial plan view of the completed inclined sidewall 28 between the teeth, forming member; I the peripheral portion ofthe body member and Fig. 6 is a front view of Fig. 5; s the dedendum of the teeth. I Fig. 7 a plan view, shown in part, of a Each of the teeth 2| has two cutting edges 25 cutting member; I I so as to be able to cut-when the rotation or re- 0 Fig. 8 is a perspective view of severalof the ciprocation is in either direction, or in only one cutting teeth; I direction. These cutting edges cooperate with Fig. 8a is a section of a bottom member showcutting edges of a bottom member, not herein ing the method asapplicable thereto; shown, butone form is shown in my co-pending Fig. 9 is apartial plan viewof a. cutting memapplication, Serial No..90,060, filed July-11, 1936,

her of a straight side razor; andan'other form is shown'inamy application filed on even date herewith, Serial No. 129,453 dated March 6, 1937. An application for aninvention consisting of a composite blade was also filed of even date herewith under Serial No. 129,452. Or, two cutting members, such as shown in either Figs. 7 or 15, can have their base sides brought face to face. In each case, the cutting edges will, during cutting, be inclined to each other and subject the hair to a shearing out. It will be particularly noted that the cutting edge is formed by planes at an acute angle to'each other, and the plane of the base side is in'each case substantially at right angles to the axis of the hair an external band 35.

being cut. The top side is non-cutting or nonabrading and is the side which contacts with the skin.

Thus from the description, it has been seen that the base side is the largest side, and from this there extends the two lateral sides 25. ancl 26 in planes which would intersect at some'point above the top side, and that the topside itself is inclined at an acute angle to the base side, the intersection line of the two planes forming the extreme peripheral portion of the cutting member. In the case of Fig. 8, theplane passing through the top side is conoidal, and in the case of Fig. 16, it is a fiat plane. This intersection line or merger line is curved in the case of Fig. 8, and straight in the case of Fig. l6.

The method of making the cutting members described is to begin with a flat, blank plate of substantially uniform thickness and of suitable metal. For a member like that shown in Fig. 7, a circular plate is used. For a member like that shown in Fig. 15, a rectangular plate is used.

, The plate is then subjected to a stamping action and is given a configuration, such as shown in Fig. 3 and in Fig. 11. The thickness of the original disc or plate is shown in Figs. .3 and 11 by the dotted parallel lines'and the space between indicated by 29. The stamping action provides'shoulders 21 and 28, then transposes the two parallel sides 33 and 3| downwardly, then forms a bent portion 32, and finally again. transposesthe two parallel sides 33 and 34, to form This bent or beaded portion is formed between the teeth. For stamping the teeth at the same time, the dies are provided with parallel inclined surfaces to form the parallel transposed surfaces 36 and 37. The structure as it comes from the stamping dies looks, in

plan, like Fig.1 or Fig. 9. Any number of blanks from suitable dies to shape these structures like Fig. 1 or Fig. 9 can be made at an extremely small cost. All that is now necessary is to subject each stamped blank, or a series of blanks, to a grinding action whereby the outer band itself, provided with serrations, is removed. The grinding action is limited to the grinding line, as shown on line 4il40, Figs. 2, 3, 10, and 11, whereby the part 35: is removed and the cutting edges of the teeth are thereby formed and sharpened.

In Fig. 8a is shown a part of a stationary or bottom cutter member, stamped from a top plate or disc, and subjected to a grinding action on line 40- -40, whereby the part 50 ,belowthe line is removed and the portion 58 with the tooth and comb 52 remains. While the top member has its teeth inclined at its sides as at 26, the teeth of the comb 52 are not inclined but perpendicular to the bottom side 53.

Thus, by a simple stamping action upon a blank, and subjecting the stamped blank-to a simple grinding operation, the cutting members maybe made by mass production. The lower cutter members may be made in the same way.

While Ihave illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modificationwithout departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desireto avail myselfof such variations, modifications, and adaptations as come within the scope of theappended claim.

I claim: v v p The method of making razor members with teeth, which consists insubjecting, a piece of sheet metal having its upper and lower surfaces parallel with each other to stamping and coining toshape the teeth, the web of the sheet metal around said coined teeth being pressed beyond the plane passing through the lower surface of the sheet metal so that the upper surface of such surrounding web material is below the lower surface of the sheet metal, and removing the surrounding web material by separating the same in a plane passing throughsaid lower surface of the sheet metal, 

